Infiniti G20 (P11). Manual — part 241
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8
CHECK WATER SEPARATOR
1. Check visually for insect nests in the water separator air inlet.
2. Check visually for cracks or flaws in the appearance.
3. Check visually for cracks or flaws in the hose.
4. Check that A and C are not clogged by blowing air into B with A, and then C plugged.
SEF829T
5. In case of NG in items 2 - 4, replace the parts.
NOTE:
I
Do not disassemble water separator.
OK or NG
OK
©
GO TO 9.
NG
©
Replace water separator.
9
CHECK EVAP CANISTER VENT CONTROL VALVE, O-RING AND CIRCUIT
Refer to “DTC Confirmation Procedure”, EC-384.
OK or NG
OK
©
GO TO 10.
NG
©
Repair or replace EVAP canister vent control valve and O-ring or harness/connector.
10
CHECK IF EVAP CANISTER SATURATED WITH WATER
1. Remove EVAP canister with EVAP canister vent control valve attached.
2. Does water drain from the EVAP canister?
SEF596U
Yes or No
Yes
©
GO TO 11.
No (With CONSULT-II)
©
GO TO 13.
No (Without CONSULT-
II)
©
GO TO 14.
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0440 EVAP CONTROL SYSTEM (SMALL LEAK) (NEGATIVE PRESSURE)
Diagnostic Procedure (Cont’d)
EC-375
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11
CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve attached.
The weight should be less than 1.8 kg (4.0 lb).
OK or NG
OK (With CONSULT-II)
©
GO TO 13.
OK (Without CONSULT-
II)
©
GO TO 14.
NG
©
GO TO 12.
12
DETECT MALFUNCTIONING PART
Check the following.
I
EVAP canister for damage
I
EVAP hose between EVAP canister and water separator for clogging or poor connection
©
Repair hose or replace EVAP canister.
13
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT-II
1. Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
2. Start engine.
3. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode.
4. Touch “Qu” on CONSULT-II screen to increase “PURG VOL CONT/V” opening to 100.0%.
5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm.
SEF595Y
OK or NG
OK
©
GO TO 16.
NG
©
GO TO 15.
14
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
3. Disconnect vacuum hose to EVAP canister purge volume control solenoid valve at EVAP service port.
4. Start engine and let it idle for at least 80 seconds.
5. Check vacuum hose for vacuum when revving engine up to 2,000 rpm.
Vacuum should exist.
OK or NG
OK
©
GO TO 18.
NG
©
GO TO 15.
DTC P0440 EVAP CONTROL SYSTEM (SMALL LEAK) (NEGATIVE PRESSURE)
Diagnostic Procedure (Cont’d)
EC-376
![](/vehicles/zatt/wheiso/zix/bitit.png)
15
CHECK VACUUM HOSE
Check vacuum hoses for clogging or disconnection. Refer to “Vacuum Hose Drawing”, EC-27.
OK or NG
OK (With CONSULT-II)
©
GO TO 16.
OK (Without CONSULT-
II)
©
GO TO 17.
NG
©
Repair or reconnect the hose.
16
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-II
1. Start engine.
2. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-II. Check that engine speed varies according
to the valve opening.
SEF801Y
OK or NG
OK
©
GO TO 18.
NG
©
GO TO 17.
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0440 EVAP CONTROL SYSTEM (SMALL LEAK) (NEGATIVE PRESSURE)
Diagnostic Procedure (Cont’d)
EC-377
![](/vehicles/zatt/wheiso/zix/ckt.png)
17
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-II
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.
SEF851X
SEF334X
Without CONSULT-II
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.
SEF851X
SEF335X
OK or NG
OK
©
GO TO 18.
NG
©
Replace EVAP canister purge volume control solenoid valve.
DTC P0440 EVAP CONTROL SYSTEM (SMALL LEAK) (NEGATIVE PRESSURE)
Diagnostic Procedure (Cont’d)
EC-378
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